Technology, explained clearly. Find a term, choose a letter or narrow the topic. Definitions include sources and their review date.
Software delivered as a provider-managed service. Customers use the application while the provider maintains its environment. Subscriptions or licences may apply; SaaS does not eliminate costs or every customer responsibility.
Definition and sourcesA program or system providing services to clients, such as HTTP responses or database access. The word also commonly describes its host machine. Servers can operate within local networks without internet access.
Definition and sourcesRecords of server events, requests and errors. They support diagnosis and auditing and need access controls, retention rules and limited secret recording.
Definition and sourcesA model where the provider manages substantial server and scaling responsibilities. Servers still exist; execution limits, costs and dependencies need assessment.
Definition and sourcesApplying software engineering to reliability and operations. It includes service objectives, error budgets and reducing manual toil, not merely monitoring.
Definition and sourcesA protocol for transferring email between servers and submitting messages from clients. Authentication and TLS use additional mechanisms. SMTP is not a mailbox-reading protocol and does not itself define encryption.
Definition and sourcesA point-in-time view of a resource. Application consistency and independence depend on the mechanism; snapshots do not always replace backups.
Definition and sourcesStorage based on semiconductor memory without spinning platters. Interface, controller and memory type affect performance; SSD does not automatically mean NVMe.
Definition and sourcesA language for defining, querying and modifying data, primarily in relational systems. Vendors implement different dialects. Queries working in one database can require changes in another.
Definition and sourcesAn initial part of a table name, such as wp_ in wp_posts. It distinguishes groups of tables. Database.table or schema.table qualifies a name rather than supplying this prefix. A prefix alone does not secure a database.
Definition and sourcesProtocols for authenticated, encrypted remote connections, including command execution and tunnelling. OpenSSH is an implementation. File transfers can use SFTP or other supported mechanisms.
Definition and sourcesA file-transfer and management protocol over SSH. It differs from FTP over TLS and requires user authentication and host verification.
Definition and sourcesA private/public key pair used for SSH authentication. Protect the private key; verifying the server's host key is a separate check.
Definition and sourcesTLS protects transmission confidentiality and integrity and provides authentication. SSL is its retired predecessor, although “SSL certificate” remains a common phrase. Modern deployments should use correctly configured TLS rather than historical SSL.
Definition and sources